Some characters are getting removed/replaced for various reasons.
1. Other character ideas were made as replacements for lower-quality characters
2. User complaints regarding character mechanics
3. Possibility of the uselessness of a character
4. Other reasons
Baldi's Basics 1 1/2 is not coming to an end any time soon. The series aims to contain better characters with better quality mechanics and features.
Surprisingly, it has nothing to do with Artem, as his controversy took place a long while ago, and I don't really focus on him anymore. He is still active, however he was not as bad as before.